/Engine/Plugins/Importers/USDImporter/Source/USDStageEditor/Public/USDStageEditorBlueprintLibrary.h
Exports all layers of the currently opened USD Stage to brand new files in a new location. Corresponds to the "File -> Export -> All Layers" action on the USD Stage Editor menu bar.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="USD|Menu Actions") static void FileExportAllLayers ( const [FString](API\Runtime\Core\Containers\FString) & OutputDirectory )